Stewart said a 44-year-old man suffered critical injuries, three were seriously hurt and four others were taken to the hospital in fair condition. An off-duty firefighter with the department was in the crowd but did not get injured.

Video footage from a news helicopter show a white van coming to rest on the sidewalk. The vehicle appeared to have knocked down a white picket fence surrounding outdoor seating for diners at The Fish Spot restaurant.

The cause of the crash is under investigation.

Los Angeles police spokesman Josh Rubenstein said the crash appeared to be an accident.

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4:45 p.m.

Authorities say a vehicle plowed into a group of people on a Los Angeles sidewalk, injuring six people.

Stewart said four people were taken to the hospital; their conditions were not immediately known. Two others were transported with non-life threatening injuries.

Video footage from a news helicopter show a white van coming to rest on the sidewalk. The vehicle appeared to have knocked down a white picket fence surrounding outdoor seating for diners at The Fish Spot restaurant.